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US2437441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring metal surfaces
Assignee: ASSOCIATED CHEMICAL Co
•
Filing: 1945-02-14
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Granted: 1948-03-09
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Expires: 1965-02-14
Abstract
No abstract record available.
Inventors
- 👤 Rogers Linnaeus Joslyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:54
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077450A
Cited
US2364993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |